Precision-casting core, precision-casting core manufacturing method, and precision-casting mold
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsHidetaka OGUMA, Kazutaka MORI, Ikuo OKADA, Sachio SHIMOHATA
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Abstract
A coating layer including solely silicon alkoxide or mixed alkoxide of silicon alkoxide and aluminum alkoxide is formed on a surface of a sintered precision-casting core body mainly including silica particles so as to seal holes formed in the surface. As a result, it is possible to prevent the breakage of the core during casting.
Claims11
A precision-casting core obtained by forming a coating layer of two kinds of silica materials having different particle diameters on a surface of a sintered precision-casting core body mainly including silica particles.
(canceled)
A precision-casting core obtained by forming a coating layer including a silica material, an alumina material, and silica fume on a surface of a sintered precision-casting core body mainly including silica particles.
A precision-casting core manufacturing method comprising:
- immersing a sintered body of a precision-casting core body mainly including silica particles into a coating material including two kinds of silica materials having different particle diameters;
- drying the sintered body;
- and
- heating the sintered body so as to form a coating layer on the surface of the precision-casting core body.
(canceled)
A precision-casting core manufacturing method comprising:
- immersing a sintered body of a precision-casting core body mainly including silica particles into a coating material including a silica material, an alumina material and silica fume;
- drying the sintered body;
- and
- heating the sintered body so as to form a coating layer on the surface of the precision-casting core body.
The precision-casting mold according to claim 6,
- wherein the silica material is silica sol and the alumina material is alumina sol.
Dependencies are inferred from the claim text.